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The Coffey Firm Blog

Blood Composition Affects Breath Tests
The Coffey Firm Blog

Blood Composition Affects Breath Tests

The breath test result is predicated on a blood to breath partition ratio of 2100:1.  Many folks do not have this exact ratio.  Different countries use different ratios. A person who is anemic, has less red blood cells.  Different cancers and health conditions contribute to a different blood breath partition ratio.  Of course, these factors are never taken into account when a subject is arrested and a breath test result…
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October 21, 2025
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